Can I make Bags, Interior Props, or Shoes, etc?

Yes, you can create any fabric items through Marvelous Designer.

You might need some kind of assets or dummies where the flat patterns could sit within the 3D window while simulation. (e.g. Bag Frames, Bed Frames, etc.)

For more tutorials, visit our official Youtube channel.

Bag tutorial:
https://www.youtube.com/watch?v=xPENO3REhjk

Interior fabric tutorial: 

https://www.youtube.com/watch?v=rnJ1vYhyQ7o&list=PLYQUdblF9eDWMHOfEoiB7uQt8LYB0g8bN

https://www.youtube.com/watch?v=Gokn1Elo6co

Shoes tutorial:

https://youtube.com/watch?v=AvBmQ4w04_8&feature=share

https://youtube.com/watch?v=yPsToQ4naFc&feature=share